Punch Keith F. (2006). Introduction to social research: Quantitative and qualitative approaches (2.). Sage.
Citación estilo ChicagoPunch Keith F. Introduction to Social Research: Quantitative and Qualitative Approaches. 2. London: Sage, 2006.
Cita MLAPunch Keith F. Introduction to Social Research: Quantitative and Qualitative Approaches. 2. Sage, 2006.
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